I ate anything I wanted to- spicy foods, dairy, gassy foods, the occassional caffeine and alcohol. If you begin to notice that your baby is having intestinal issues or rash issues, and you can link it to something you eat, then cut that out then (I had a friend who's little girl developed excema when she ate tomatos and strawberries). But the more diverse your diet, the more diverse the baby's tastes will be. They also say that the more you expose them to different foods while nursing, the less likely they are to develop allergies in the future (there are always exceptions of course!)